pls tell Q 16 and Q 18
Pls be step by step
meaningful Answer needed
Thanks
Ch Direct and Inverse Variation
Answers
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Here is the solution:
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Question 16:
Naresh + Yogesh can do the work in 7 1/2 days
⇒ 7 1/2 days = 15/2 days
⇒ i day = 2/15 of the work
Naresh can do the work alone in 20 days
⇒ 1 day = 1/20 of the work
Find the amount of work Yogesh can do in a day:
1 day = 2/15 - 1/20 = 1/12
Find the number of days needed to complete the work:
1/12 of the work = 1 day
12/12 of the work = 1 x 12 = 12 days
Answer: Yogesh will complete the work in 12 days
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Question 18:
25 kg can last 30 days for 6 people
⇒ 25 kg : 30 days : 6 people
Find the number of people after 3 guest joined in:
Total number of people = 6 + 3 = 9
Find the number of days the 25kg can provide for 1 person:
25 kg : 30 x 6 days : 6 ÷ 6 people
25 kg : 180 days : 1 people
Find the number of days the 25kg can provide for 9 person:
25 kg : 180 ÷ 9 days : 1 x 9 people
25 kg : 20 days : 9 people
Answer: The food will last for 20 days with 3 more guests.